Tag: self pollination

Questions Related to self pollination

The condition of maturation of anthers and stigmas of the same flower simultaneously is

self pollination asexual and sexual reproduction in plants botany

  1. Xenogamy

  2. Geitonogamy

  3. Allogamy

  4. Homogamy

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Correct Option: D
Explanation:

Geitonogamy: The transfer of pollen grains from the anther of a flower to the stigma of another flower borne by the same plant.

Xenogamy: Transfer of pollen grains from the anther of a flower to the stigma of another flower borne on a different plant but belonging to the same species.

Allogamy is the deposition of pollen grains from the anther of the one flower on the stigma of another flower, either in the same plant or in a different plant of the same species.

Homogamy: It is the condition in which flowers are bisexual anther and stigma mature at the same time to make self-pollination possible. Under this condition, the stigma receives the pollen grains from the anthers of the same flower by the agency of wind or insects.

 So, the correct answer is D.

What is pre-requisite for self pollination?

self pollination asexual and sexual reproduction in plants botany

  1. Chasmogamy

  2. Homogamy

  3. Absence of pollenkitt

  4. Absence of nectar

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Correct Option: A

The condition of maturation of stigma before anthers of the same flower is

self pollination asexual and sexual reproduction in plants botany

  1. Protandry

  2. Herkogamy

  3. Protogyny

  4. Prepotency

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Correct Option: C

Assertion (A):  Self ineompatibility is not an absolute phenomenon.
Reason (R): Even highly self-incompatible species can be self-pollinated by one stratagem or another.

self pollination asexual and sexual reproduction in plants botany

  1. Both A and Rare individually true and R is the correct explanation of A

  2. Both A and Rare individually true and R is not the correct explanation of A

  3. A is true but R is false

  4. A is false but R is true Assertion

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Correct Option: A

Consider the following with reference to sporophytic (SSI) or gametophytic (GSI) self-incompatibility systems:
1. SSI-3 celled pollen, rejection reaction on the stigma
2. GSI -2 celled pollen, rejection reaction in the style. SSI -2 called pollen, rejection reaction in the style.
3. GSI- 3 celled pollen, rejection reaction on the stigma
Which of these features are correct in the case of sporophytic gametophytic self- incompatibility systems?

self pollination asexual and sexual reproduction in plants botany

  1. 1 and 2

  2. 2 and 3

  3. 2 and 4

  4. 3 and 4

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Correct Option: A

Cleistogamy is found in _____________.

self pollination asexual and sexual reproduction in plants botany

  1. Ficus

  2. Commelina

  3. Vallisnerea

  4. Anthocephalus

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Correct Option: A